Do I need an access point or something different?

I have an AT&T router that is for my internet and is required to make my system work, so there will be no changes to that. Where I have my main router located the signal does not reach the other side of the house. I have my house wired with Cat 5a. Can I hook an access point to the Ethernet I have in the other section of the house? What would be the best way to extend the signal. I don't use the wireless much in that part, but I do use the wired access more than anything. I still need wireless though.

I have an older piece right now that is going bad and I need to get something new.

Any recommendations as to what people are using right now?

I have had pretty good luck with these;
https://www.amazon.com/TP-Link-AV100...xpY2s9dHJ1ZQ==

But they do need reset every so often. I am not sure if I am sending data across the fuse box or not in some installations but 3/3 so far has worked.

I have been using these, two of them.
100% signal strength everywhere in our two-story house and out in the back yard.

https://www.servethehome.com/synolog...i-mesh-router/

It could be a bit pricey to get all set up tho.

Nice Buckeye, I plan on getting a lap top with my woping $1200 fed cash:D
I'm not to sure how these puppy's work, I'm still doing XP, point is, I need windows 10, all about the APPS i guess.

OPP